Category Archives: Marine

How fishfinders work

How Fishfinders Work

Modern recreational sonar equipment (also called a fishfinder, bottom machine, echo sounder, depthsounder, or just sounder) uses sound waves to look through the water. The sonar device then displays a picture of what’s below the hull of a boat. Sound pulse. First it sends a pulse of sound down, via the transducer. The sound bounces off objects in the…

Learn More About: Side Imaging (SI) Sonar & Dual Beam PLUS

Side Imaging (SI) Sonar Side Imaging® Sonar, with its amazingly clear, picture-like images of fish, the bottom and structure, is available exclusively in select 1100, 900 and 700 Series fishfinders. It’s the ultimate structure-finding tool, and with its massive coverage (480 feet from side to side!) you can scan in mere minutes what used to take hours. Features…